On campaign level where you have to fix computer monitor, get
yourself some room to breathe by killing the enemies, or do the code
as it is, although you are very likely to get blown up. Jump on the
keys on the keyboard and spell "TEAM17" (no spaces). You will get a
message at the top of the screen stating that you unlocked a hidden
Easter Egg. The secret is a new voice option for teams.
Play the Nobody Rides For Free mission, where you need to collect
the 3 boxes of land mines. Play for awhile and a fourth box will
appear where you started the level. When you collect it, you will
get a message that you have found an Easter Egg. The voice that you
unlocked is called "Grandpa".

In the Grave Danger mission (where you must blow open the graves
with grenades), behind one of the houses is a very small
circle-shaped grave. There is steam or smoke coming out of the
grave, just like the big ones. Drop a grenade on top of the grave,
jump down into the grave, and you will get a message that you have
found an Easter Egg. The voice that you unlocked is called "Horror".

Enter smashsumfruit (North American version) for a tiny island
with all the worms. As you start it, all worms will be destroyed
by a big explosion and the result will be a tie.

Set the theme to "Arctic" then enter Bigape (North American
version) for a landscape with 2 frozen submarines, 2 ice
slides and several ice bridges.

Set the theme to "War" then enter bangbang (North American
version) for a map with a blimp held up by a metal wire and a few
large islands.

Set the theme to "England" and then enter igotworms (North
American version) for a landscape with a bridge leading to a house
on a very steep cliff.

Enter 257462320 or 194915571 (European version) for a very small
map that only contains a little bit ground and a tiny bridge.
Information in this section was contributed by Thomas starhill.
Enter 1585104494 (European version) for a very high altitude map.
Enter 241780260 Worms3D (European version) for a very long map.
Enter 221350867 (European version) for a map with 4 consecutive
submarines.

In levels where there are objects floating in the air, if you
teleport onto them sideways, there is a chance that you will
actually teleport inside the object. This is especially true for the
green air ships.

Enter 257462320 or 194915571 for a very small map that only
contains a little bit ground and a tiny bridge.
Information in this section was contributed by Thomas starhill.
Enter 1585104494 for a very high altitude map.
Enter 241780260 Worms3D for a very long map.
Enter 221350867 for a map with 4 consecutive submarines.

In levels where there are objects floating in the air, if you
teleport onto them sideways, there is a chance that you will
actually teleport inside the object. This is especially true for the
green air ships.